C.I. Sulphur Orange 4 (8CI)

N-(4-(4-acetamido-3-nitrophenyl)-2-nitrophenyl)acetamide and sulfur or more Sodium sulfide in 200 ~ 250 ℃ calcination. Note: use N-(4-methyl-3-nitrophenyl)acetamide or Benzene-1,4-diamine of acetyl derivatives to cure, and in 200 ~ 300 ℃ under the condition of same roasting, and it can get a little nature of the same color (GP 82748).

orange. Soluble in water for brown; In the sodium sulfide solution for yellow brown; In concentrated sulfuric acid to red light brown, dilution after red light brown, precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	4	4-5	4-5	4-5		5	3-4